Hold your breath: we may be living in a smoky Universe that dims light from distant objects such as quasars, or so say astronomers working on the Sloan Digital Sky Survey (SDSS).

• 别惊讶：我们可能生活在一个烟雾缭绕的宇宙，来自类星体之类遥远天体的光是被削弱过的。这是正在进行斯隆数字巡天(SDSS)的天文学家们的说法。